trig function styling

1 files changed, 20 insertions, 5 deletions

diff --git a/src/ui.rs b/src/ui.rs
index 0aa1a2b..7222935 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -7,6 +7,8 @@ use std::io;
 use tui::{
     backend::{Backend, CrosstermBackend},
     layout::{Alignment, Constraint, Direction, Layout, Rect},
+    style::{Modifier, Style},
+    text::{Span, Spans},
     widgets::{Block, Borders, List, ListItem, Paragraph, Widget},
     Frame, Terminal,
 };
@@ -15,16 +17,14 @@ use crate::Calculator;
 
 const WIDTH: u16 = 32;
 
+const FUNCTIONS: [&str; 1] = ["sin"];
+
 impl Calculator {
     pub fn draw<B: Backend>(&self, f: &mut Frame<B>) {
         let chunks = layout(self.stack.len(), f.size());
         f.render_widget(version_number_widget(), chunks[0]);
         f.render_widget(stack_widget(&self.stack), chunks[2]);
-        f.render_widget(
-            Paragraph::new(format!("> {}", self.input_buffer))
-                .block(Block::default().borders(Borders::ALL)),
-            chunks[3],
-        );
+        f.render_widget(input_buffer_widget(&self.input_buffer), chunks[3]);
     }
 }
 
@@ -80,6 +80,21 @@ fn stack_widget(stack: &Vec<f64>) -> impl Widget {
     .block(Block::default().borders(Borders::ALL))
 }
 
+fn input_buffer_widget(input_buffer: &str) -> impl Widget {
+    Paragraph::new(Spans::from(vec![
+        Span::raw(">"),
+        Span::styled(
+            format!(" {}", input_buffer),
+            if FUNCTIONS.contains(&input_buffer) {
+                Style::default().add_modifier(Modifier::BOLD)
+            } else {
+                Style::default()
+            },
+        ),
+    ]))
+    .block(Block::default().borders(Borders::ALL))
+}
+
 fn version_number_widget() -> impl Widget {
     Paragraph::new(format!("pfc-{}", option_env!("CARGO_PKG_VERSION").unwrap()))
         .alignment(Alignment::Center)